8L2Z6B321A, 8L2Z6B321C, 3L2Z6B321AA. Type: Harmonic Balancer. 1x Harmonic Balancer. for Ford Explorer 4.0L 2002-2010. for Ford Explorer Sport Trac 4.0L 2001-2005&2007-2010. for Ford Ranger 4.0L 2001-2011.